* A horde of angry protesters chanting, “This is what democracy looks like!” burst into a fancy ballroom to interrupt a speech Mayor Bloomberg was delivering on the city’s economy yesterday.

Police arrested eight of the demonstrators for trespassing and disorderly conduct.

About 50 protesters, furious at the mayor over budget cuts, affordable housing plans and certain development projects, chanted and waved signs that read, “Mayor Bloomberg, talk to us about the future of NYC!” as Bloomberg addressed business leaders at a Crain’s New York Business luncheon.

“We’re concerned with losing jobs, the economic crisis that was caused by the people in that room. Now Bloomberg is asking them what they think the future of New York City is,” said Alice Orman, a Bronx resident who participated in the protest.

“Common working folks want to have a voice too, and those voices are never heard.”

They barged into the Grand Hyatt ballroom in Midtown just as the mayor, who is running for re-election this year, was touting his administration’s accomplishments on increasing affordable housing, reducing crime, improving public education and restoring parkland.

He stopped speaking for three minutes while hotel security guards ushered the crowd out of the ballroom, where hundreds of executives were gathered for the mayor’s speech.